The length of sheet metal measuring from the lid to the bottom in order to hold back gravel and concrete from the vault chamber.
Water Tight, 14 Gauge Galvanized Sheet Metal,
Cover: 3/8" Reinforced Sheet Metal, Complies with H2O RatingSecure method: Metal Cam locksLift method: Hydraulic cylinderCover Color: Primer Gray, Or Gloss BlackGasket: Low Swell H.N.BReinforcing: 14 Gauge Sheet Metal. Features: 1 1/4 wide lip for cover supportManholes shipped assembledMade by CNI Manufacturing.
Also known as Manhole, Manway, Christy Box, Well BoxAll CNI manholes are made-to-order at the time your order is placed. They are a non-stock item. Custom options available.
The drawing below is for a 12" skirt specs would change if a different skirt length is selected.